If you have license metadata turned on and try to save the 'No Institution' institution you get these errors:

[WAR] b8 (admin/users/institutions.php:590) Undefined index: licensemandatory
Call stack (most recent first):

    log_message("Undefined index: licensemandatory", 8, true, true, "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 590) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/errors.php:430
    error(8, "Undefined index: licensemandatory", "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 590, array(size 3)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:590
    institution_validate(object(Pieform), array(size 35)) at Unknown:0
    call_user_func_array("institution_validate", array(size 2)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:1348
    Pieform->validate(array(size 35)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:506
    Pieform->__construct(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:170
    Pieform::process(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:71
    pieform(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:522

[WAR] b8 (admin/users/institutions.php:682) Undefined index: licensemandatory
Call stack (most recent first):

    log_message("Undefined index: licensemandatory", 8, true, true, "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 682) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/errors.php:430
    error(8, "Undefined index: licensemandatory", "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 682, array(size 11)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:682
    institution_submit(object(Pieform), array(size 35)) at Unknown:0
    call_user_func_array("institution_submit", array(size 2)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:528
    Pieform->__construct(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:170
    Pieform::process(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:71
    pieform(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:522

[WAR] b8 (admin/users/institutions.php:683) Undefined index: licensedefault
Call stack (most recent first):

    log_message("Undefined index: licensedefault", 8, true, true, "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 683) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/errors.php:430
    error(8, "Undefined index: licensedefault", "/home/robertl/htdocs/mahara-testing/mahara/htdocs/...", 683, array(size 11)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:683
    institution_submit(object(Pieform), array(size 35)) at Unknown:0
    call_user_func_array("institution_submit", array(size 2)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:528
    Pieform->__construct(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:170
    Pieform::process(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/lib/pieforms/pieform.php:71
    pieform(array(size 5)) at /home/robertl/htdocs/mahara-testing/mahara/htdocs/admin/users/institutions.php:522